[参考译文] TMS320F280025C：事件触发中断生成

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https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1165563/tms320f280025c-event-trigger-interrupt-generation

器件型号：TMS320F280025C

您好！

事件触发中断的产生有问题、我希望在 CTR = 0时生成由 ePWM1触发的中断。因此、您可以看到我的配置下面的内容。

问题：ETSEL.INTSEL 等于1，因此 CTR = 0 和 INTEN = 1可以启用中断。 ETPS 配置出现问题我想选择 ETPS.INTPRD、因为我想在每次触发时生成事件。

那么 ETPS.INTPRD 将等于1 NO？在 CCS 窗口调试器中、您可以看到 ETPS.INTPRD = 0。如何通过 driverlib 选择此位？使用此函数 ePWM_setInterruptEventCount (EPWM1_BASE、1)选择 ETINTPS.INTPRD2。

我在 ePWM1和 INT_EPWM1之间看到 *** 时序有什么问题？我想将 ePWM1上升沿与 INTePWM1上升沿同步。

粉色信号：ePWM1

黄色信号：INT_EPWM1 (1个输入中断、0个输出)

如果我在每个事件中选择中断、ETPS.INTPRD 和 ETINTPS.INTPRD2之间有何不同？

#include "device.h"

__interrupt void isr_read_adc(void);

void main(void)
{
    /// Initialize device clock and peripherals
    Device_init();
    /// Disable pin locks and enable internal pullups.
    Device_initGPIO();
    /// Initialize PIE and clear PIE (for pie multiplexer) and IFR (for cpu) registers (IER for pie table).
    Interrupt_initModule();
    /// Initialize the PIE vector table with pointers to the shell Interrupt Service Routines (ISR).
    Interrupt_initVectorTable();

    /// Disable sync and clock to PWM
    SysCtl_disablePeripheral(SYSCTL_PERIPH_CLK_TBCLKSYNC);

    /// Parameters
    EPWM_setTimeBaseCounterMode(EPWM1_BASE, EPWM_COUNTER_MODE_UP);
    EPWM_setTimeBaseCounter(EPWM1_BASE, 0U);
    /// To have around 0.05% (See ePWM chapter in Chapter 17 Technical reference manual page 1798) do point for ePWM precision who is the maximum precision with the ePWM module.
    /// If we want more precision use the HRPWM module.
    EPWM_setClockPrescaler(EPWM1_BASE, EPWM_CLOCK_DIVIDER_1, EPWM_HSCLOCK_DIVIDER_1);
    /// Set up shadowing
    EPWM_setCounterCompareShadowLoadMode(EPWM1_BASE, EPWM_COUNTER_COMPARE_A, EPWM_COMP_LOAD_ON_CNTR_ZERO);
    /// Set actions for boost assembly
    EPWM_setActionQualifierAction(EPWM1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
    EPWM_setActionQualifierAction(EPWM1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    /// For buck assembly
    EPWM_setActionQualifierAction(EPWM1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB);
    EPWM_setActionQualifierAction(EPWM1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

    EPWM_setTimeBasePeriod(EPWM1_BASE, 2499);
    EPWM_setCounterCompareValue(EPWM1_BASE, EPWM_COUNTER_COMPARE_B, 1250);

    /// Interrupt where we will change the Compare Values
    /// Select INT on Time base counter zero event,
    /// Enable INT, generate INT on 1rd event
    EPWM_setInterruptSource(EPWM1_BASE, EPWM_INT_TBCTR_ZERO);
    EPWM_enableInterrupt(EPWM1_BASE);
    /// To trigger the interrupt at each event, maximum value equal to 15.
    EPWM_setInterruptEventCount(EPWM1_BASE, 1);

    EPWM_setPhaseShift(EPWM1_BASE, 0);
    EPWM_disablePhaseShiftLoad(EPWM1_BASE);

    GPIO_setPinConfig(GPIO_42_GPIO42);
    GPIO_setDirectionMode(42, GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(42, GPIO_PIN_TYPE_STD);
    GPIO_writePin(42, 0);

    /// GPIO initialization EPWM1
    EALLOW;
    GPIO_setPinConfig(GPIO_0_EPWM1_A);
    GPIO_setPinConfig(GPIO_1_EPWM1_B);
    EDIS;

    Interrupt_register(INT_EPWM1, &isr_read_adc);
    Interrupt_enable(INT_EPWM1);
    /// Enable sync and clock to PWM
    SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_TBCLKSYNC);

    /// Enable Global Interrupt (INTM) and realtime interrupt (DBGM)
    EINT;
    ERTM;

    while(1)
    {

    }
}

__interrupt void isr_read_adc(void)
{
    EPWM_clearEventTriggerInterruptFlag(EPWM1_BASE);

    GPIO_writePin(42, 1);
    DEVICE_DELAY_US(2);
    GPIO_writePin(42, 0);

    Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP3);
}